| Make | Model | Problem | Solution | Date |
| | | |
| Found: 711
|
| Sharp | C1891 | Int brightness variations | Hi value resistors in A1 supply | 14-09-04 |
| Sharp | C1891 | No colour. | I801 ( RH-1X0109 ) , Q407. | 14-09-04 |
| Sharp | C2002 | Dead. | STR4090. | 14-09-04 |
| Sharp | C2002 | Standby - no switch on some times from s/by. | R717 ( 390k ) , C720 , R712 , last IC701. | 14-09-04 |
| Sharp | C2015P | Vertical line in the middle of screen. Vertical IC defective. Type: X0238CE | Replace with a common uPC 1378. (Fully compatible) | 14-09-04 |
| Sharp | C2051 | Tuning drift | Q104 2SC458A on sensor panel | 14-09-04 |
| Sharp | C2072 | Lack of height | Set running perm off start up supply - R237 15k o/c or dry joint Q209 | 14-09-04 |
| Sharp | C2072 | No sound - o/p stages working | R319 270R o/c | 14-09-04 |
| Sharp | C2092 | Int blank white screen & dist sound | IC401 IX0118CE which contains clamping cct | 14-09-04 |
| Sharp | C2092 | No tuning memory & only half a tuning bar | Check pin 7 I1005 - should be 0v in search, if high check I1010 IX0135CE & R1072 33k | 14-09-04 |
|
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| Sharp | C2092 | Raster - white - sound deterioration. | IC401 ( IX0118CE ) | 14-09-04 |
| Sharp | C2095 | No tuning memory. | R1072 ( 33k , 0.5W ) o/c. | 14-09-04 |
| Sharp | C2095 | Tuning restricted - tuning volts rises to 8v only | IC11012 TC4081 OSD chip faulty - tuning ok when this chip removed but with no OSD - chip replaced | 14-09-04 |
| Sharp | C3702H | Weak drive either RGB | Check D807 D808 D809 & TDA3566 | 14-09-04 |
| Sharp | C3703H | Dead fuse intact no output PSU | STR40090 u/s | 14-09-04 |
| Sharp | C3703H | dist sound & int on chan change - no vol control | T301 sound discrim coil faulty - set up with can fitted | 14-09-04 |
| Sharp | C3703H 7PS | Dead - no o/p from psu | STR40090 psu chopper chip | 14-09-04 |
| Sharp | C3705HD | No pic - interrference only - sound ok | Like white tadpoles - IF module RUNTK0065CEN1 | 14-09-04 |
| Sharp | C3705HD | No signals or tuning volts at tuner | Crack in print between R1016 & R209 on edge of pcb | 14-09-04 |
| Sharp | C3705HD | St/by only | Mains relay terminal dry joints - take out of st/by with r/c | 14-09-04 |
| Sharp | C3720 | Int brill level & Height | Dry joint reg Q604 near mains sw | 14-09-04 |
| Sharp | C3720H | COMES ON THEN GOES STRAIGHT OFF into StBy | R521 3R9 OC also check D502 | 14-09-04 |
| Sharp | C3720H | No controls aft 2 hrs | Micro IX1559CEZZ | 14-09-04 |
| Sharp | C3720H | St/by only - EHT briefly at sw on | No supply to FOP stage - D502 & R521 in 24v supply faulty | 14-09-04 |
| Sharp | C3720H | Striations on picture & 'black fingers' | Lopt o/c pins 6 to 7. Can be replaced with HR7675. Short out Pin 8 to pin 5, then wrap the flying loose wire around the lopt 1 extra turn then fit in pins 11 & 12 reverse them if you get loud whistling ! | 14-09-04 |
| Sharp | C3720H | Tuning drift | IC1003 - used ZTK33 | 14-09-04 |
| Sharp | C3720H | Weak blue drive | D807 on small sub panel connected to crt base leaky (use 1N4148 in lieu) & TDA3566 dec chip | 14-09-04 |
| Sharp | C3720H 14A | Reverts to st/by at sw on | 122v HT to LOP but no line drive; R521 3R9 fusible res in FOP 24v supply o/c - check D502 | 14-09-04 |
| Sharp | C3720H 14A | St/by only after brief green LED | R521 3R9 in 24v supply o/c - next to LOPTx | 14-09-04 |
| Sharp | CA1 | Replacing TDA884x/N1 with N2 | TDA884x versions 1Y and 2Y are not interchangeable.
Version 1Y is now obsolete. So if you use 2Y instead of 1Y make the following changes:
1. remove L205 (IF-VCO coil pin 13-14)
2. change R407 from 68R to 47R (SCART video out)
3. change R802 from 220R to 150R (Video in)
4. change R204 from 1M to 4.7M (pin 15 - Vcc)
5. write to EEPROM address 0C value 40 | 14-09-04 |